@mkdirs
It seems the open source project is not getting support and updates since January 2024, I'm sorry about that.
i have php 7.4.33
This is a very old version of PHP and has ended his support: https://www.php.net/supported-versions.php and can have security issues.
github Requirement PHP 7.3 or higher, PHP 8
Maybe this is also not updated, you need have a PHP superior to the version 8.0
The last PHP version is 8.3, you should use an upgraded PHP but consider UVdesk may be not updated as well so some security issue of not updated dependencies, etc can exist.